Wrench.



J. B. IRWIN.

-WRENGEL APPLICATION FILED 111111.26. 190s.

Patented Apr'. 12, 1910. 4

,77. 1dr /1 wi?? UNITED sTACQas PATENT oEEToE.

JE'ssE B. IRWIN, or WASHINGTON, PENNSYLVANIA.

WRENCH.

To all whom it may concern.'

Be it known that l, JESSE B. IRWIN', a citizen of the United States ofAmerica, residing at Washington, in the county of- Washington and Stateof Pennsylvania, have invented certain new and useful Improvements inWrenches, of which the following is a specication, reference being hadtherein tothe accompanying drawing.

Thisv invention relates toy wrenches, and the invention has for itsobject to provide a simple and inexpensive wrench that can be easily andquickly adjusted.

My invention aims to provide a wrench with posit-ive and reliable meansfor quickly adjusting the movable jaw thereof, and after placing the jawin engagement with a nut or similarlobject to minutely adjust the sameto obtain a positive grip upon an object and prevent the wrench fromslipping.

To this end, I rovide a wrench with an adjustable rack ar for moving thejaw thereof, and to adjust said rack bar, I utilize aiutdvhich ismutilated -or cut away to provide clearance for the rack bar, wherebysaid bar can be quickly adjusted, and then the nut moved-to minutelyadjust said bar.

The construction entering into my invention will be'hereinafterdescribed in detail and then specically pointed out in theappendedclaim, and reference will now be had to the drawing forming a art ofthis application wherein ythere 1s il ustrated the preferred embodimentsof, my invention, but I would have it understood that the detailconstruction thereof can be varied or changed without departing from thespirit washer, and Fig. 8 is a cross sectional viewof the same. l

In the drawing, 1 designates a shank havl'ing the upper end thereoflprovided with a fixed jaw 2, while the=lower end of said shank iscontracted, as at 3, and rovided with threads 4. The front side'of t 1eshank 1 is provided with a longitudinal groove 5",

Specification of Letters Patent.

Application med March 2e, 1909.

Patented Apr. 12, 1910.

serial No. 485,867.

said groove extending from the contracted portion 3 thereof to within ashort distance of the fixed jaw 2 that end of the groove 5 1nproximity44 to the-jaw 2-having a curved lwith respect to said shank andadapte to receive the angular end 9 of a rack bar 10 slidably mounted inthe groove 5 of the shank 11 designates a collar mounted upon the shank1 intermediate the ends thereof, said collar having a vertical groove 11adapted to register wlth the groove 5 of the. shank 1 and provideclearance for the'rack bar 10.

13 deslgnates a nut revolubly mounted upon the shank 1 beneath thecollar 11, said nut having interior threads 14 for engaging the threads15 of the rack bar 10. The threads 14 are mutilated 'or cut away, as at'16, .to provide clearance for the threads 15 of the rack bar 10, wherebythe jaw 6 and the rack bar 10 can be easily and quickly moved-relativeto the shank 1. The'nut 13 is provided withV two dependin lugs 17 and`18 adapted to abut against t e projection 19, carried -by a washer 20,located upon the shank 1 beneath4 the nut 13, said washer having.anopening 21 providing clearance for'the shank 1 and a vertical groove 22providing clearance for the rack bar 10.

23 designates-'a handle mounted upon the lower end of the shank 1 forholding the washer 20 and the nut 13 in position beneath the collar 11,said handle being cut away as at 24 to provide clearance for the lowerend of the shank 1 and the rack bar 10. The handle is retained upon the'contracted portion 3 of .the shank by a nut 25 screwed upon the threads4. With the lug 18 engagingthe projection 19 of the washer 20,the'threds 14 of the nut 13 engage the threads 15 of the rack bar 10 andrevent said rack bar from being rapidly shifted in the groove 5 of theshank 1. With the lug17 1n engagement withthe projection 19, the groove16 of the nut registers with the rack bar 10' and provides' clearancefor the threads thereof,

whereby said rack bar and the jaw 6 can be rapidly shifted u on theshank 1. To facilitate the manipu ation of ,the nut 13, said. nut isprovided with -an enlargement 26,=

which can be used as a thumb piece.

It is thought that the utility and operation of my Wrench Will be fullyunderstood Without further description, and I reserve the right to makethe saine of strong and durable metal'vvith the handle of wood.

I'Iaving now described my invention what I claim as new, is :ba

A Wrench comprising a shank having a longitudinallyextending groove inone side thereof, a jaw fixed to said shank, a movable jaw upon theshank, a handle connected to the shank and provided with a groove opHposing the groove ofthe Shank, a stationary Washer mounted directly uponand provided With a groove registeringl With the groove in the handle,said Washer provided -with a right-angularly disposed peripheralprojection, an adjustable rack bar mounted in the groove of the shankand connected to said movable jaw, a rotatable nut provided with a'peripheral thumb piece and mounted direetly upon said Washer, said nuthaving its threads out-away to provide a passage for the har when thelatter is shifted and further adapted to engage the teeth of the bar formaintaining it in its adjusted position, a stationary Washer mounteddirectly upon the nut and provided With a -groove opposing the groove ofthe shank, and a pair ot depending lugs formed integral with theperiphery of the nut, disposed at right angles with respect to eachother and extending in the path of and adapted to engage .saidprojection whereby 'the rotativL-\ movement of the nut is limitedin'either direct-ion.

In testimony whereof I aftix my signature in the presence of twoWitnesses.

JESSE B. IRWIN.

Witnesses S. N. BUsBEY, J. B. IRWIN, Sr.

